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The Global Atmosphere Watch (GAW) Programme of the World Meteorological Organization (WMO) aims at providing reliable long-term observations of the chemical composition and physical properties of the atmosphere that are relevant for understanding atmospheric chemistry and climate change. Reactive gases are one of the foci of the GAW programme. This group includes carbon monoxide (CO), which is present only in trace quantities in the atmosphere but plays an important role in atmospheric chemistry. Compatibility of data from different observational platforms and sites is of crucial importance fo ...

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Guidelines for the Measurement of Atmospheric Carbon Monoxide

The Global Atmosphere Watch (GAW) Programme of the World Meteorological Organization (WMO) aims at providing reliable long-term observations of the chemical composition and physical properties of the atmosphere that are relevant for understanding atmospheric chemistry and climate change. Reactive gases are one of the foci of the GAW programme. This group includes carbon monoxide (CO), which is present only in trace quantities in the atmosphere but plays an important role in atmospheric chemistry. Compatibility of data from different observational platforms and sites is of crucial importance for the early detection of global trends or slight variations in chemical composition of the atmosphere. In many cases, decades of time series are required to assess these changes with a certain degree of confidence. Support of the long-term stability of the reference scales and its propagation to in-situ measurements are particular prerequisites to meet these demands. In this document we focus on continuous in-situ and flask measurements of carbon monoxide performed from different platforms.

The World Climate Applications and Services Programme (WCASP) fosters the effective application of climate knowledge and information for the benefit of society and the provision of climate services, including the prediction of significant climate variations both natural and as a result of human activity.

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World Climate Applications and Services Programme (WCASP)

The World Climate Applications and Services Programme (WCASP) fosters the effective application of climate knowledge and information for the benefit of society and the provision of climate services, including the prediction of significant climate variations both natural and as a result of human activity.

Three-dimensional climate models with a fully interactive representation of stratospheric ozone chemistry otherwise known as stratosphere-resolving chemistry-climate models (CCMs) are key tools for the attribution and prediction of stratospheric ozone changes arising from the combined effects of changes in the amounts of greenhouse gases (GHG) and ozone-depleting substances (ODS). These models can also be used to infer potential effects of stratospheric changes on the climate of the troposphere. In order to know how much confidence can be placed in the results from the CCMs, both individually ...

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SPARC Report on the Evaluation of Chemistry-Climate Models

Three-dimensional climate models with a fully interactive representation of stratospheric ozone chemistry otherwise known as stratosphere-resolving chemistry-climate models (CCMs) are key tools for the attribution and prediction of stratospheric ozone changes arising from the combined effects of changes in the amounts of greenhouse gases (GHG) and ozone-depleting substances (ODS). These models can also be used to infer potential effects of stratospheric changes on the climate of the troposphere. In order to know how much confidence can be placed in the results from the CCMs, both individually and collectively, it is necessary to assess their performance by comparison with observations and known physical constraints.

The Sixth Session of the JCOMM Ship Observations Team (SOT) was held at the auditorium of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) Division of Marine and Atmospheric Research (CMAR), Hobart, Australia, from 11 to 15 April 2011 at the kind invitation of the Government of Australia. The Session was co-sponsored by the Australian Bureau of Meteorology (BOM) and CSIRO.
As for previous SOT Sessions, a technical and scientific workshop focusing on new initiatives and / or new developments in shipboard meteorological or oceanographic instrumentation, observing ...

The Sixth Session of the JCOMM Ship Observations Team (SOT) was held at the auditorium of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) Division of Marine and Atmospheric Research (CMAR), Hobart, Australia, from 11 to 15 April 2011 at the kind invitation of the Government of Australia. The Session was co-sponsored by the Australian Bureau of Meteorology (BOM) and CSIRO.
As for previous SOT Sessions, a technical and scientific workshop focusing on new initiatives and / or new developments in shipboard meteorological or oceanographic instrumentation, observing practices, data management procedures, and quality control and ocean products was organized during the first day of the meeting. Eight presentations were delivered during the workshop, which covered each of the theme areas, and permitted to prepare further discussions at the main SOT Session.

The 18th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases, and Related Measurement Techniques (GGMT - 2015) took place from 13 to 17 September 2015 at the Scripps Institution of Oceanography in La Jolla (CA), USA. It was the 40 th anniversary of the first GGMT meeting (then called "CO 2 Experts Meeting") which was also held at Scripps in 1974. WMO has provided the framework for all carbon dioxide experts meetings since 1975. IAEA in Vienna joined WMO as a co - organizer in 1997 due to the increased use of carbon isotopes in studying the carbon cycle. The meeting reviewed current WMO ...

The present document will be part of the information upon which the Parties to the United Nations Montreal Protocol will base their future decisions regarding ozone-depleting substances, their alternatives, and protection of the ozone layer. It is the latest in a long series of scientific assessments that have informed the Parties.